#pragma once 
#include <iostream>
#include<unistd.h>
#include<string>
#include<cstring>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>

#include"nocopy.hpp"
#include"Log.hpp"

using namespace log_ns;

static const int gsockfd=-1;
static const int glocalport=8888;

enum{
    SOCKET_ERROR=1,
    BIND_ERROR
};

// UdpServer user("192.1.1.1",8899);
class UdpServer : public nocopy
{
public:
    UdpServer(const std::string &localip,uint16_t localport=glocalport)
    :_sockfd(gsockfd),
    _localport(localport),
    _localip(localip),
    _isrunning(false)
    {

    }
    void InitServer()
    {
        // 1.创建socket文件，这里AF_INET表示网络套接，SOCK_DGRAM表示UDP套接字
        _sockfd=::socket(AF_INET, SOCK_DGRAM,0);
        if(_sockfd<0)
        {
            LOG(FATAL, "socket error\n");
            exit(SOCKET_ERROR);
        }
        LOG(DEBUG, "socket create success, _sockfd: %d\n", _sockfd);//3

        // 2.bind
        struct sockaddr_in local;
        memset(&local,0,sizeof(local));
        local.sin_family=AF_INET;
        local.sin_port= htons(_localport);
        local.sin_addr.s_addr = inet_addr(_localip.c_str()); //--暂时写法// 1.需要4字节IP，2.需要网络序列的IP

        int n = ::bind(_sockfd, (struct sockaddr*)&local, sizeof(local));
        if(n<0)
        {
            LOG(FATAL, "bind error\n");
            exit(BIND_ERROR);
        }
        LOG(DEBUG, "socket bind success\n");
    }
    void Start()
    {
        _isrunning = true;
        char inbuffer[1024];
        while(_isrunning)
        {
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            ssize_t n = recvfrom(_sockfd, inbuffer,sizeof(inbuffer)-1, 0, (struct sockaddr*)&peer, &len);
            if(n>0)
            {
                inbuffer[n] = 0;
                std::string echo_string= "[udp_server echo] #";
                echo_string += inbuffer;

                sendto(_sockfd, echo_string.c_str(), echo_string.size(), 0, (struct sockaddr *)&peer, len);
            }
        }
    }
    ~UdpServer()
    {
        if(_sockfd > gsockfd) ::close(_sockfd);
    }

private:
    int _sockfd;
    uint16_t _localport;
    std::string _localip;//TODO:后面专门要处理一下这个IP
    bool _isrunning;
};